A little self-contained pomodoro timer for love2d

conf.lua

function love.conf(t)
	t.window.width, t.window.height = 200, 60
	t.window.x, t.window.y = 10, 10
	t.window.borderless = true
	t.window.title = "Pomodoro!"
end

main.lua

--[[
	little pomodoro timer script to go off on a configurable interval
]]

local intervals = {
	{"work", 25},
	{"rest", 5},
}

local t = 0
local i = 0

local limit = 0
local label = ""

love.graphics.setFont(love.graphics.newFont(32))

-- generate beep audio
local rate = 44100
local duration = 0.25
local freq_a = 440
local freq_b = 440 * 2
local samples = rate * duration
local beep = love.sound.newSoundData(samples, rate, 16, 1 )
for i = 1, samples do
	local t = i / rate
	local note = ((1 - (i / samples)) * 2)
	local note_vol = note % 1
	local freq = note < 1 and freq_a or freq_b
	local a = math.sin(t * freq * math.pi * 2)
	local b = (a * a) * 2 - 1
	local v = a * b * note_vol

	beep:setSample(i - 1, 1, v)
end
beep = love.audio.newSource(beep)

function love.update(dt)
	t = t - dt
	if t <= 0 then
		--beep
		beep:seek(0)
		beep:play()
		--next interval
		i = i + 1
		if i > #intervals then
			i = 1
		end
		local cfg = intervals[i]
		label = cfg[1]
		limit = cfg[2] * 60
		t = limit
	end
end

function love.draw()
	love.graphics.setColor(0.5, 0.5, 0.5, 1.0)
	love.graphics.rectangle("fill", 0, 0, love.graphics.getWidth() * t / limit, love.graphics.getHeight())
	love.graphics.setColor(1.0, 1.0, 1.0, 1.0)
	love.graphics.printf(
		label,
		0, 10,
		love.graphics.getWidth(),
		"center"
	)
end

function love.keypressed(k)
	if k == "n" or k == "space" then
		--skip to next
		t = 0
	end
	if k == "escape" then
		love.event.quit()
	end
	if love.keyboard.isDown("lctrl") then
		if k == "q" then
			love.event.quit()
		elseif k == "r" then
			love.event.quit("restart")
		end
	end
end